/Engine/Plugins/Runtime/SmartObjects/Source/SmartObjectsModule/Public/SmartObjectUserComponent.h
validation filter to be used for entries.
[TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [USmartObjectSlotValidationFilter](API\Plugins\SmartObjectsModule\USmartObjectSlotValidationFilter) > GetValidationFilter() const